Method and system for negotiation of media between communication devices for multiplexing multiple media types

A method for negotiation of media between a first communication device and a second communication device, the method comprising:

• the first communication device generating an offer message identifying a first transport candidate for communication of a first type of data and a second transport candidate for communication of the first type of data and a first transport candidate for communication of a second type of data and a second transport candidate for communication of the second type of data, the first and second transport candidates for communication of the first type of data and the first and second transport candidates for communication of the second type of data supporting both multiplexing transmission and non-multiplexing transmission, wherein the offer message also comprises a first bundleport identifier indicating a transport address for multiplexing of the first type of data and a second bundleport identifier indicating a single transport address for multiplexing of both the first type of data and the second type of data, wherein the first type of data is comprised of audio data and the second type of data is comprised of video data;
• the first communication device sending the offer message to a second communication device to establish a communication connection along at least one payload path for the transmission of the first type of data and the second type of data between the first and second communication devices, the offer message being sent prior to the first communication device receiving information of a capability of the second communication device to multiplex multiple media types on a transport address;
• establishing only a single payload path between the first and second communication devices for transmission of both the first type of data and the second type of data via multiplexing in response to an answer message indicating that the second communication device supports multiplexing;
• establishing a first payload path between the first and second communication devices for transmission of the first type of data and a second payload path between the first and second communication devices for transmission of the second type of data in response to the answer message indicating the second communication device does not support multiplexing.

A non-transitory machine readable medium containing a program that is executable by a first communication device, the first communication device performing a method defined by the program when the program is executed by the first communication device, the method comprising:

• the first communication device generating an offer message identifying a first transport candidate for communication of a first type of data and a second transport candidate for communication of the first type of data and a first transport candidate for communication of a second type of data and a second transport candidate for communication of the second type of data, the first and second transport candidates for communication of the first type of data and the first and second transport candidates for communication of the second type of data supporting both multiplexing transmission and non-multiplexing transmission, wherein the offer message also comprises a first bundleport identifier indicating a transport address for multiplexing of the first type of data and a second bundleport identifier indicating a single transport address for multiplexing of both the first type of data and the second type of data, wherein the first type of data is comprised of audio data and the second type of data is comprised of video data;
• the first communication device sending the offer message to a second communication device to establish a communication connection along at least one payload path for the transmission of the first type of data and the second type of data between the first and second communication devices, the offer message being sent prior to the first communication device receiving information of a capability of the second communication device to multiplex multiple media types on a transport address.